Hi I'm trying to build boost with the vacpp (IBM Visual Age C++) compilers, but the iostreams library won't build. It appears to be missing include files zlib.h and bzlib.h: xlC -c -I/project/projectdirs/mp363/sunrise/pbuild/boost_1_33_1 -qNOOPTimize -qnoinline -g -qfullpath -qnotempinc -qfuncsect -qeh -qrtti -I"bin/boost/libs/iostreams/build" -I"/project/projectdirs/mp363/sunrise/pbuild/boost_1_33_1" -I"/project/projectdirs/mp363/sunrise/pbuild/boost_1_33_1" -o "bin/boost/libs/iostreams/build/libboost_iostreams.a/vacpp/debug/bzip2.o" "/project/projectdirs/mp363/sunrise/pbuild/boost_1_33_1/libs/iostreams/build/../src/bzip2.cpp" ...failed xlc-C++-action bin/boost/libs/iostreams/build/libboost_iostreams.a/vacpp/debug/bzip2.o... xlc-C++-action bin/boost/libs/iostreams/build/libboost_iostreams.a/vacpp/debug/zlib.o "/project/projectdirs/mp363/sunrise/pbuild/boost_1_33_1/libs/iostreams/build/../src/zlib.cpp", line 18.10: 1540-0836 (S) The #include file "zlib.h" is not found. xlC -c -I/project/projectdirs/mp363/sunrise/pbuild/boost_1_33_1 -qNOOPTimize -qnoinline -g -qfullpath -qnotempinc -qfuncsect -qeh -qrtti -I"bin/boost/libs/iostreams/build" -I"/project/projectdirs/mp363/sunrise/pbuild/boost_1_33_1" -I"/project/projectdirs/mp363/sunrise/pbuild/boost_1_33_1" -o "bin/boost/libs/iostreams/build/libboost_iostreams.a/vacpp/debug/zlib.o" "/project/projectdirs/mp363/sunrise/pbuild/boost_1_33_1/libs/iostreams/build/../src/zlib.cpp" ...failed xlc-C++-action bin/boost/libs/iostreams/build/libboost_iostreams.a/vacpp/debug/zlib.o... ...skipped <@boost!libs!iostreams!build/libboost_iostreams.a/vacpp/debug>libboost_iostreams-xlc-d-1_33_1.a for lack of <@boost!libs!iostreams!build/libboost_iostreams.a/vacpp/debug>libboost_iostreams-xlc-d-1_33_1.a(bzip2.o)... ...skipped <@boost!lib>libboost_iostreams-xlc-d-1_33_1.a for lack of <@boost!libs!iostreams!build/libboost_iostreams.a/vacpp/debug>libboost_iostreams-xlc-d-1_33_1.a... xlc-C++-action bin/boost/libs/iostreams/build/libboost_iostreams.a/vacpp/debug/threading-multi/bzip2.o "/project/projectdirs/mp363/sunrise/pbuild/boost_1_33_1/libs/iostreams/build/../src/bzip2.cpp", line 18.10: 1540-0836 (S) The #include file "bzlib.h" is not found. This is with xlC 8.0.0.0 on an IBM SP5 running AIX5. Any hints for resolving this would be appreciated. Thank you, /Patrik Jonsson